Why are my  Pigs Foaming and Frothing at the Mouth: Reasons and Solutions


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Why are my  Pigs Foaming and Frothing at the Mouth: Reasons and Solutions


Generally, when a pig is healthy, they have a normal wet mouth with a relaxed tongue. You’ll notice the difference immediately if your pig starts foaming at the mouth. There will be lots of chomping and tongue movement as the saliva builds up to form the foam.


Let’s take a look at five reasons that cause pigs to foam and froth at the mouth:

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1. Pig Tapeworm (Taenia Solium)

A nasty and scary symptom of a tapeworm infestation in pigs is seizures. During a seizure your pig will convulse while chewing and chomping and begin foaming at the mouth. Taenia Solium, also known as the armed tapeworm, is a common (and troublesome) parasite that affects pigs who live close together in a pen.The pork tapeworm parasite spreads when your pig unknowingly ingests the eggs through contaminated food and pig droppings. The tapeworm then moves to the intestinal walls and anchors itself in your pig’s muscles and small bowel.

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Symptoms of Pork Tapeworm Infestation

If your pig has a tapeworm infestation, they’ll present with these common symptoms:

Diarrhea and vomiting

Chomping and chewing excessively

Sudden loss of weight

Foaming at the mouth (or frothy saliva)

Hunched over in pain

READ ALSO 10 Sick Pig Symptoms and the Steps to Take (Two)

Convulsions and loss of consciousness

Ear stiffening

Healthy pig have normal wet mouth and relaxed tongue

Helpful Solutions for Pork Tapeworm 

Here are a few helpful solutions for pork tapeworm infestation:

A single dose of Praziquantel effectively eliminates adult parasites. Alternatively, Niclosamide (4 tablets) can also be administered one at a time to paralyze and kill the parasites.

Give your pig some papaya (ensure you remove the seeds, as they can cause a blockage in the intestinal tract). Papaya contains loss of weight that kill intestinal worms.

Feed your pig 2 to 3 cloves of raw garlic daily to prevent the tapeworm parasites from thriving. Garlic naturally has antifungal, antiseptic, and antibacterial properties.

2. Oestrus Cycle and Being “In Heat”

Another common reason sows and boars foam and froth at the mouth is when they’re in heat. The boar makes loud chomping sounds to stimulate the buildup of saliva. After a few minutes, the saliva creates a thick and quite sticky foam.


This foam contains pheromones and androstene steroids (a chemical produced in the testicles and concentrated in the salivary glands) which attract the sow. You’ll notice the foam has an almost tangy smell and smells different from the standard foam that’s formed when anticipating food, for example.


A sow will also foam at the mouth when she is in heat, although the amount of foaming is nothing like the boar.

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Symptoms of a Pig in Heat

Your pig will display the following symptoms if they’re in heat:

Loud chomping and grunting

Frothing and foaming at the mouth

The sow has a “standing reflex” – ears erect and back arched

The sows vulva will swell and turn red

READ ALSO Essentials of Pig nutrition for every pig farmer 

Helpful Solutions for Foaming from Pigs Being in Heat

Here are a few helpful solutions for when your pig is in heat and foaming:


Ensure only one boar is servicing the sows in a pen. This avoids aggression and injury among the pigs.

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If you don’t want the pigs to mate, separate them until the sow’s heat cycle is over (two2 to three days).

If your pigs are frustrated, try distracting them by throwing some hay into their pen.They’ll rummage around in the hay and forget about their frustration.

Consider sterilizing your pigs if you don’t plan on using them for breeding. It can stop the development of smelly foam.



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